Examples of etch.util.FlexBuffer

etch.util.FlexBuffer
A FlexBuffer wraps a byte array and manages the active region of it (0..length). It also supports dynamically extending the buffer as needed. A FlexBuffer also has an index (read or write cursor). The various get and put operations always occur at the current index, with the index adjusted appropriately afterward. Get will not move index past length. If put needs to move index past length, length is also adjusted. This may cause the byte array to be re-allocated to a larger size.


  /** @throws Exception */
  @Test
  public void packet4() throws Exception
  {
    FlexBuffer buf = new FlexBuffer( new byte[]
    { VERSION, 2, 0, NONE } );
    
    session.msg_handled = false;
    
    m.sessionPacket( who, buf );

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        buf.flip();
        byte[] bbuf = new byte[buf.remaining()];
        buf.get( bbuf );
        
        FlexBuffer fbuf = new FlexBuffer( bbuf );
        session.sessionData( null, fbuf );
      }
      finally
      {
        if (buf != null)

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  @Test
  public void packet1() throws Exception
  {
    // Create empty packet to send
    assert p.headerSize() == 8;
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // space for header:
      0, 0, 0, 0, 0, 0, 0, 0
        // packet data:
    } );

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  @Test
  public void packet2() throws Exception
  {
    // Create 1 byte packet to send
    assert p.headerSize() == 8;
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // space for header:
        0, 0, 0, 0, 0, 0, 0, 0,
        // packet data:
        1

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  @Test
  public void packet3() throws Exception
  {
    // Create 2 byte packet to send
    assert p.headerSize() == 8;
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // space for header:
        0, 0, 0, 0, 0, 0, 0, 0,
        // packet data:
        2, 3

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  @Test( expected = IllegalArgumentException.class )
  public void packet4() throws Exception
  {
    // Create too-small packet to send
    assert p.headerSize() > 7;
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // space for header:
      0, 0, 0, 0, 0, 0, 0 // too short!
        // packet data:
    } );

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  @Test( expected = IllegalArgumentException.class )
  public void packet5() throws Exception
  {
    // Create too-small packet to send
    assert p.headerSize() > 0;
    FlexBuffer buf = new FlexBuffer( new byte[] {} );
    p.transportPacket( who, buf );
  }

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  /** @throws Exception */
  @Test( expected = IOException.class )
  public void bad1() throws Exception
  {
    // Create data to send
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // packet header:
      0, 0, 0, 0, 0, 0, 0, 0 // bad sig
        // packet data:
    } );

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  /** @throws Exception */
  @Test( expected = IOException.class )
  public void bad2() throws Exception
  {
    // Create data to send
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // packet header:
      1, 2, 3, 4, 0, 0, 0, 0 // bad sig
        // packet data:
    } );

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  /** @throws Exception */
  @Test( expected = IOException.class )
  public void bad3() throws Exception
  {
    // Create data to send
    FlexBuffer buf = new FlexBuffer( new byte[]
    {
      // packet header:
      -34, -83, -66, -17, 0, 1, 0, 0 // size too big
        // packet data:
    } );

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